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Introduction
QRA provide numerical estimates to allow companies to
understand risk exposure to people, business, the
environment, markets or other areas of interest. QRA
studies account for potential releases of hazardous
material, their consequences (e.g., fire, toxic,
explosion, etc.) and estimated frequency of occurrence.
Techniques such as fault tree analysis (FTA) are used to
determine probabilities of events.
Consequence estimates are obtained using source term
models to calculate material releases, dispersion models
to calculate concentrations at points within and around
the facility, health effect models to determine the
effect of released materials on workers and the public,
and F-N (societal risk) curves to assess the likelihood
of an undesirable impact to the neighboring community.
QRA is particularly effective in providing a frame of
reference in decision-making of complex risk issues.
Our Services
A Quantitative Risk Assessment typically consists of
four major tasks:
- Identifying and defining possible hazardous events
(accidents) and their potential outcomes.
- Estimating the annual probability of occurrence of
each potential outcome of each hazardous event.
- Calculating the consequences of each potential
outcome of each hazardous event.
- Combining the probabilities and consequences to
arrive at estimates of individual and societal risks.
We have the complete modeling tools
and data needed to perform a QRA which combines accident
consequences and probabilities into various risk
measures including indices, individual risk, and
societal risk. The results are presented as point
estimates, risk contours, or frequency-number (F-N)
curves.
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